- Descrizione
308 stainless steel plate is not a commonly standardized base stainless steel grade like 304 O 316. In most industrial usage, “308 stainless steel” refers to a chromium-nickel austenitic alloy primarily used as a welding filler metal (308 / ER308 / 308l) that is closely related to 304 stainless steel chemistry.
In plate form, it is generally understood as a 304-compatible austenitic stainless steel with stabilized welding and corrosion performance, widely used in welded fabrication systems.
Composizione chimica di 308 Piastra in acciaio inossidabile
The composition is designed to provide strong weldability and corrosion resistance similar to 304 acciaio inossidabile, but with optimized welding performance.
| Elemento | Contenuto (%) |
|---|---|
| Cromo (Cr) | 18.0–20.0 |
| Nichel (In) | 9.0–11.0 |
| Carbonio (C) | ≤ 0.08 (or ≤ 0.03 for 308L) |
| Manganese (Mn) | ≤ 2.00 |
| Silicio (E) | ≤ 1.00 |
| Fosforo (P) | ≤ 0.045 |
| Zolfo (S) | ≤ 0.03 |
| Ferro (Fe) | Bilancia |
Proprietà meccaniche
308 stainless steel exhibits typical austenitic stainless steel performance with good strength and excellent ductility.
| Proprietà | Valore tipico |
|---|---|
| Resistenza alla trazione | 520–750MPa |
| Forza di snervamento | ≥ 205 MPa |
| Allungamento | ≥ 40% |
| Durezza | ≤ 200 HB |
| Densità | 7.9 g/cm³ |
Principali caratteristiche prestazionali
1. Eccellente saldabilità
308 stainless steel is widely recognized for its excellent welding compatibility, especially for joining:
- 304 acciaio inossidabile
- Similar austenitic stainless steels
It is commonly used as a matching or over-alloyed filler material to improve weld strength and corrosion resistance.
2. Buona resistenza alla corrosione
It provides corrosion resistance similar to 304 acciaio inossidabile, adatto per:
- Ambienti atmosferici
- Mild chemical exposure
- Food-grade processing environments
- Water systems
It performs well in general industrial conditions but is not intended for highly chloride-rich environments.
3. Stable Austenitic Structure
308 stainless steel maintains a fully austenitic structure, offerta:
- Non-magnetic behavior (condizione ricotta)
- Good toughness at low temperature
- Stable mechanical properties after welding
4. Good Formability
The material has excellent processing performance:
- Piegatura
- Stampaggio
- Rotolamento
- Imbutitura profonda
- Fabrication of welded assemblies
Applicazioni comuni di 308 Piastra in acciaio inossidabile
308 stainless steel plate is mainly used in welding-related fabrication and general industrial structures.
Le applicazioni tipiche includono:
- Welding fabrication structures
- Stainless steel pipe welding systems
- Pressure vessel welding components
- Attrezzature per la lavorazione degli alimenti
- Chemical equipment linings
- Heat exchanger assemblies
- Serbatoi di stoccaggio industriali
- Structural welded frames
- Automotive exhaust welding parts
- General stainless steel fabrication projects
308 Stainless Steel vs 304 Acciaio inossidabile
| Proprietà | 308 Acciaio inossidabile | 304 Acciaio inossidabile |
|---|---|---|
| Main Role | Saldatura & fabrication support | Base structural material |
| Composizione | Slightly higher Ni balance | Standard 18-8 inossidabile |
| Saldabilità | Eccellente | Bene |
| Resistenza alla corrosione | Similar | Bene |
| Uso tipico | Welding filler / welded systems | Fabbricazione generale |
